Activity App is missing

Hi!

This morning I went to the apple store to see if they could resolve my issue and they could not. I wanted to see if anyone else is having the same issue and if you have found a solution.

My apple watch series 1 is paired with my iphone 7plus. My activity app on my watch monitors my activity just as its suppose to do. However, the app is missing on my phone. With the activity app missing on my phone my data will not show up on my Health app. We rebooted the phone and the watch, as well as doing a hard reset/restore! We also set the phone up as a new phone instead of backing it up and still no luck. When I try to download the app it says, "This app requires specific features not available on this device". My phone is also currently up to date.